Heating furnace



June 23, 1925.

Fil ed Oct Fig.2

3 SheetslwSheep 2- BYW 8.35m

ATTORNEY.

,J. M. LAUBE HEATING FURNACE;

Filed QJQM 35%., 1:922 s Sheets-Sheet 5 I IN VEN TOR.

A TTORNEY.

p at 10, 10, and the furnace bottom wall platevjoint well adapted forfactory madegoods- Patented June 23, 1925.

UNITED STATES" 1,543,112. 1P, A OFFICE,

:rosnrn m. LAUBE, or BELLINGHAM; WASHINGTON.

HEATING FURNACE.

Application filed October 30, 1922 fSerial'No. 597,929.

To all whom it may concern:

Be it known that I, JOSEPH M. LAUnn, a

citizen of the United States, and a resident trated in the threesheetsof accompany" ing drawings in'lwhich Figure 1 is a front elevationof a pipeless, hot-airjfurna'ce em-.v

bodying my improvements. Fig. 2 is a side elevation of Fig. 1 partly insection on a vertical medial plane. Fig. 3 is a frontelevation ofthehumidifying device drawn on a larger scale. Fig. 4 i'sa side elevationof Fig. 3 partly in section on a medial vertical plane. Fig. 5 is a sideelevation of the front end of the fire potand ash pit partly broken awayand drawn on a larger scale. Fig. 6 is an elevation view inverticalsection of one of the exterior-wall plate, air-tight jointsdrawn on a larger scale. Fig. 7-is acbottom plan view of Fig. 6. Fig. 8is a horizontal section of one of the corner joints of the exteriorwalls drawn on a larger scale.

Similar characters refer to similar parts throughout. Certain parts arebroken away to show other parts hidden thereby.

The term air-tight as used throughout this specification is properlyapplicable under the difference of pressure pertaining between the innerand outersides of the exterior walls of heating furnaces.

' More particularly: My furnace is preferably of rectangular horizontalcross section. As illustrated, the front wall is 'at V8, the rear wallat 9, and the exterior side walls at 11. The top of the furnace isdrawn'in to form a truncated pyramid the outer walls of which areindicated by 12, and on top of this, rests grating 13 which is usuallyflush with thetop floor surface of'the room, to be heated. The stovebolts used to fasten.

the several parts of the walls together are trate my method of making anairtight which are to be shipped in knocked-down shape. Figs. 6 and?show a joint used to connect the edges of the horizontal seam betweenthe bottom-and top parts of side plates 10. Thelower edge of the upperplate is bent outward atright angles, then it is bent upward at 6 at anangle of about 30, then downward at 0 to enclose an angle of about thenits edge is folded, over inwardly at al The upper edge of the lowerplate is bent outward at an angleof 90 and its edge bent upward at 6 atan angle of about 10 to lie in angle 0 The edges of the plates lOa-reset together to bring them in the same plane and a row of spaced,registering bolt holes made through their adjacent edges. Round asbestoswicking 15 is placed in angle 0 beneath edge e and the joint is sealedthereby when bolts 14 tightly clamp the twoedges together. It is readilyunderstood-that this joint is easily formed on a tinners brake in platessuit-, ably heavy forthe purpose intended. Also the plates to be joinedby these connections. are readily assembled at the place of'installation. The air-tight joint used for making the plate connections at thevertical corners between front and back and side plates is shown in Fig.8 in horizontal section. This illustration will require nofurtherexplanation because 1 of its similarity to the :one above described. Thejoint shown in Fig. 8 is-also adapted for join ng bottom plate 11 andfront, back and side plates, 8,9, 10 and '10, respectively. Also thejoint shown in Figs. .6 and 7 is suited for connecting said front, backand side plates withfurnace top 12- by a slight change inthe angularity.The corners of furnace top 12 are look joints of usual construction.Within said top at its upper end is centrally placed short, hollowcylinder 6 which is joined with a locked seam with the top of adownwardly flaring connection 16, a, the opposite sides 0, of which areriveted along their lower edge tightly to the front and rear sides oftop 12 near theirlower edge, and flaring sides 16 are joined along theirlower edges'to the upper edge of inner wall plates18, 18, leaving coldair flues 17 17 between saidflaring connection andthe side walls oftopv12. Inner side walls 18, 18, asstated, are connected along their upper.edges withthe lower edges of the sides of flaring connec tion 16, 16 andextend downward to within abQYl? 999 f o ef furnace bottom. 1;- The heror hot-airflue of the furnace.

openings in said door.

vertical edges of said inner walls are bent over at right angles and theedges thus turned are bolted to front and rear plates 8 and 9 at adistance from side plates lO'to' form the lower part of cold air fines17, 17. The space between said inner walls 18, 18 and front and rearouter walls 8 and 9 together with the space enclosed by connection 16, aand ring I) is the central cham- The fure nace front is shown at 20having ash-pit door 21 and fire-box door 22 hinged thereon. Draft door'ais hinged along its upper edge to ash-pit door 21 and covers a draftopening through said door. Check draft damper a is'pivoted to the frontof door 22 and controls the admission of air through Shield 23 havingtriangular sides a, a is fastened to the inside wall of fire-box'door22. and not only protects said door from the furnace heat, but causesair, passing through door 22, to first cool shield 23 and then pass frombehind the shield below its bottom and enter the fire potclose to thefuel within the same and pass rearward over the top of said fuelproviding oxygen for a slow combustion the ashes from whichwill aid incovering said fuel to aid in checking said burning. Furnace front 20 isbolted to the flange a, of fire box 29 and ash pit30 and to front plate8 of the furnace with asbestos gasket 81 between said furnace wall andsaid flange. This closure seals the 'joint between said wall 8 andflange a against the passage of air. Front plate 24 of water pan25extends as a flange beyond said pan and is bolted to front furnace plate8 with asbestos gasket 28 between to seal the joint against the passageof air. Funnel 26' has pi'p'e nipple 27 welded to its rear wall near itsbot-- tom and this pipe enters a hole through plate 24 into pan 25 nearits bottom. A gasketis placed between funnel '26 and plate 24 andbetween said plate and the nut of nipple 27 and around said nipple tocause a' Watertight connection and joint around said pipe where'itpasses through plate 24:. A cover a? is" fitted over the top of funnel26. A small quantity of water in panes is sufficient to stand abovepipe27 and seal the connection between saidfunnel and pan against thepassage of air therethrough. Firebox 29, when for a wood burning furnace is preferably cylindrical and placed horizontally inthecentralfurnace chamber near itsbottom. Ash pit 30 is welded to firebox 29' and its side walls are extended to formthe neck of fire box 29at 5 and fiangedat a for clamping to furnace front 20 as describedabove. Wall 0 provides a partition between neck 5 and ashpit 30. 31 is'the asbestos gasket between flange a and-front wall 8 as describedabove. Return flue radiator 32 is preferably a hollow cylinderand placedin aliorizont'al position When properly done this joint is tight againstthe passage of air under the pressures existing. Nipple 38 is closed bycover a. Smoke pipe nipple 34Lis welded to the rear' end of radiator 32and protrudes throughrear wall 9 with which it makes an air tightclosure by means of curved flange 6 fine connection between. the firepotand the radiator as described. Two sets of brackets 37 are fastened toopposite sides of the interior walls of'radiator32. On each set:

of said brackets is placed horizontally one of radiator dampersideplates or slideway plates38. Saidplates preferably have pins 39which'engagefin holes 'in brackets 37.

Plates 38 'are"narrow and serve as slideways Each has a rib a 'on' tsupper side'andfacmg edge and on these;

for the damper.

ribs ismounted damper 40-. Side plates are substantially as long as theradiator;

But damper' lO is' shortertha'n said radiator by the width of theopening desired for the passage" of smoke through the radiator.Saiddamper 40 is reciprocable" longitudinally on its slidewaysanditsfp'osition in the radiator determines the course of the smoke throughthe radiator; If the damper is close to th'e' front' end of theradiator; the smoke passes directlytln'ough the rear end of the radiatorinto the stack; if the damper is close to the rear of the radiator, thesmoke must pass horizontally through'the lower half of the radiatorbeneath theside' plates 3'8and damper 40 to the front endof the radiatorwhere'it rises past the front'end of the damper and then passesrearward'above' the damper and side plates and into said stack; and ifthe'damper' occupies a medial position lengthwise of the radiator, saidsmoke divides and passes over both of said The damper 40 is shown infull lines in Fig. 2 in its rear position and in paths.

dotted'linesatetO in its forward position.

In" a holethrough dainper'tO is engaged hook 42 of damper rod 41, andsaid damper rod is mounted in a 'hole'throi'igh nipple cover a andhashandled exterior to said cover. Damper 40 is settable inany desiredposition within its-range of movement in theradiator by means of rod 41.When desired damper 40 can be removedfrom Nipples 35 and 36 join toprovide a radiator 32 by removing cover a, and withdrawing said damper,then, if'desired, rod 41 can be disengaged from the damper at hook 42.Also each of damper plates 38 can be removed by hand through nipple 33.When thus cleared radiator 32 can easily be cleaned with a properutensil by shoving the accumulated ashes and soot backward to fall intothe firebox through nipples i and 36, and, if said damper and sideplates are worn out, their replacement with new ones is easilyaccomplished, An opening is placed in each of side walls 10 near thebottom through which dust can be removed from the furnace floor. Theseopenings are reinforced on the interior of said side walls 10 by frames44 which have tapped holes for clamping screws to retain covers 43 inplace on gaskets 45. In this manner an air-tight closure is provided forthese lower clean-out holes not diflicult to remove and replace.

My sectional damper plate made of substantial dimensions and materialwith its sliding-section and easy-removable features has been found tobeta good solution for this dificult part of the furnace design.

Having thus disclosed my invention, what I claim as new and desire tosecure by Letters Patent is, p

1. In a heating furnace in combination, a combustion chamber, a radiatorchamber above said combustion chamber the lower rear part of which hasflue connection with said combustion chamber and the rear upper part ofwhich has flue connection with a smoke pipe and having a clean-outopening in its front wall, a removable cap having a small holetherethrough over said clean-out opening, two damper slideways removablymounted on the interiorwalls of said radi-v ator to extend in slidewayrelation from the front to the rear thereof and located midway betweenthe bottom and top thereof and adapted for installation and removalthrough said clean-out opening, a damper shorter than said radiatormounted therein for reciprocation onsaid damper slideways and adapted topass through said clean-out opening for installation and removal, and adamper rod connected to said damper and mounted for reciprocation insaid hole in said clean-out-opening cap.

2. In a heating furnace in combination, a radiator, chamber the lowerrear part of which has a flue connection with the combustion chamber ofsaid furnace and the rear upper part of which has a flue connection witha smoke pipe and also having a cleanout opening in its front wall, aremovable cap over said clean-out opening, removable damper slidewaysmounted on the inner radiator.

JOSEPH M. LAUBE.

'ciprocate said'damper from outside said u

